Unable to get Primary Keys in the tables

[ShivamRelhan]

I am not able to get primary key in EmailDelivered , EmailOpened , EmailSent , FormSubmitted , FormVisited , WebsiteVisited . 

Below is the reference of one of the Table nad other tables are also present in this :
EmailDelivered in CustomerInsightsJourneys - Common Data Model - Common Data Model | Microsoft Learn

Could you please help me in finding primary key in these tables . 

Have you ever faced this issue ? what should you suggest in this case.

[Murtaza_Ghafoor]

I suggest you  Use Power Query or DAX to add an index column as a pseudo key otherwise contact your dynamic admin to check the meta data in dataverse.
Often, we needed to create composite keys or index columns manually, and document them for downstream consumers.